Spring-coiling machine



E. C. DANNER.

SPRING COILING MACHlNE.

APPucmoN FILED Nov.2o, 1919.

Patented June 22, 1920.

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E. c, BANNER. SPRING COILING MACHINE.

APPLICATION FILED NOV-20, |919.

Patented J une 22 4 sains-sum 2,1

III IIIIIIIUHIIIIMIII E. C. BANNER.

SPRING COILING MACHINE.

Patented June 22, 1920.

ow M 0I 2 V. 0 N D E L H N o H A C u DI DI A n0 1 1 .4, 4. n0 l. .1

4 SHEETS-SMH] 3.

A E. C. DANN'ER.

SPRING COILING MACHINE.

APPLICATION FILED NOV.20, 1919'.

Patented June 22, 1920.

4 SHEETS-SHEET 4.

Y NNN WN UNITED STAT/Es PATENT OFFICE.

SPRING-KCOILING MACHINE.

ySpecifcationof Letters Patent. Patented J une 22, 1920.

Application iled'November 20, 1919.` Serial No. 339,312.

. T all whom it may concer/n.'

Be it known that I, EMIL C. DANNER, a citizen of the United States, residing in the borough of Westmont, in the county of Cambria andState of Pennsylvania, whose i post-oliice address is Johnstown, Pennsylvania, have invented certain new and use# ful Improvements in Spring-Coiling Machines; andI do herewith declare the following to be` afull, clear, and exact description, suchas will enable others skilled in the art tok which it appertains to make and use the same. y

My inventiony relates to improvements in machines for spring coiling and is more especially designed for coiling heated bars of metal around a mandrel to form helical springs.

One of the objects of my invention is to provide a plurality of rotary mandrels upon which the coils are wound. Heretofore it has been the custom in making springs of this kind to have a single mandrel around which the heatedl bar isk coiled and when it is` desired to make another size of spring the mandrel has to kbe removed and another one put in its place, which requires time and labor.

After the hot bar is coiled around the forming mandrel if .it is not removed quickly the contraction ofthe metal by coolingand the scale which is formed, tend to cause the coil-spring to stick to the mandrel around which it is formed,l and it has here.

obviate these difficulties by having a plural'- ity of rotary mandrelsv which may be rotated simultaneously and arranged in such a manner thatwhile the heated baris being coiled on one mandrel, the completed spring is being removed from a second mandrel and a third mandrel is being cooled or quenched.

upon the mandrel and then the' mandrels are revolved and the coil removed before it contracts sufficiently to stick upon the mandrel.

Another obj ect of the inventiony is to have -the mandrels formed so they may be easily and quickly removed in order that the other sized mandrels may be substituted in their places,-so that different sized springs may be formed. 'A further object of my invention relates to means for gripping the end of the spring, which means is controlled and operated by Huid-pressure; and still another object of my invention resides in the mechanism for advancing the guide for the springrod and 'carriage and then automaticall retracting them at the end of the wor 'ng stroke. My invention further consists in other novel devices and combinations of parts as will hereinafter more fully appear.

Having thus given a general description of my invention, I will now, in order to make the matter more clear, refer to therannexed four sheets of drawin s, which form part of this specification an in which like characters refer to like parts.

Figure 1 is a top plan view of my improved machine; Fig. 2 is a. front end elevation of the end of the machine on which the coiling mandrels are mounted. Fig. 3 is a rear end elevation of the end of the machine' on which the motor and driving gearing are mounted. Fig. 4 is a vertical transverse sectional elevation taken on the line IV-IV of Fig. 10; Fi 5V is a rear side elevation of the machine; Fig. 6 is a vertical transverse sectional elevation taken on the line VI-VI of Fig. 1; Fig. 7 is a vertical transverse sectional elevation taken on the line VII-VII of Fig. 5; Fig. 8 is a vertical longitudinal sectional elevation of the rotary coiling mandrels drawnon a larger scale, the section being taken about on the center line of the machine; Fig. 9 is a vertical sectional kelevation through the clutch shaft and Fig. V15 is a detail vertical transverse sectional'elevation through the split feed screw nut and attached mechanism-*taken on the line XV-XV of Fig. 16. Fig. 16 is a vertical longitudinal'sectional elevation of the detail shown in Fig. 15 taken on the line XVI-*XVI of'Fig. 15. yFig. 17 is a hori-` l zontal longitudinal sectional elevation of the same detail shown in Figs. and 16 taken on the line XVII-XVII of Fig. 16. F ig. 18 is an enlarged vertical longitudinal sectional elevation through the clamping and driving mechanism, the section being taken substantially on the center line of the machine, and Fig. 19 is a detail vertical sectional elevation taken through the clutch shaft in front of,l and showing the detent and ratchet gear in elevation. 1

Referring now to the characters of reference on` the drawings z-l indicates the base frame of the machine upon which rear and intermediate journal bearings `2 and 3 are mounted having journaled therein the clutch shaft V4, bottom train gear shaft 5,

. intermediate train gear shaft 6 and upper train gear shaft 7. On the rear end of shaft 5 is a gear 8 and at an intermediate `point thereon is a gear 9 meshing with a rgear 1() on shaft 6. (ln the outer end of the shaft 6 j is a gear 11 meshing with the gear 12 on the outer end'of the upper train gear shaft17, l

and the inner end of the shaft 7 has keyed thereto a gear 13 which meshes with a pinion 16 on the outer end of the motor shaft 15 of the motor 14.

fr feed screw shaft 17 is journaled in bearings near the upper side of the rear of the base frame 1 and the rear end of the said feed screw shaft 17 extends through an opening24 in a bracket 19 and has a gear 1S mounted thereon which meshes with an idler gear 21 which in turn meshes with the idler gear 20, which Alattermeshes with the gear S on the rear end of the bottom train gear shaft is illustratedin Figs. 11 and 12,-these idler gears and 21 are adjust ably attachedto the bracket 19 by bolts 22 which pass .through slots 23 in the bracket. The rear end of the bottom train gearshaft 5 extends through the bracket 19 and serves as a pivotal point forlthe l ackete The bracket 19 is clamped to the base frame 1 by means of a bolt, 25 passing through an arc-shaped slot 26 therein and a handle 27 extends outwardly from the bracket 19. ldlhen .it is desired to adjust the bracket 19 in case a larger or smaller train of gears is used or for any other adjustment, the clamping `bolt is loosened which Will allouv the bracket 19 to swing around its plvotal point on the shaft 5 when moved by means of the handle 27. Villien the proper adjustment has been obtained the bolt is then tightened-Which securely clamps the bracke: to the base frame l.

il rear 2S is mounted on the clutchv shaft 4 between the bearings 2 and 3 and has a` cam Wheel 29 formed integral therewith.

rl`hc detent 3() is provided with a spring 31 for projecting it 1nto the recesses 32 havmg abut-ments at either end thereof against fwhich the detent engages,l thus forming a clutch by means of which the rotation of the clutch shaft 4 is controlled. A contact bar 34 pivoted to'a bracket bar 35, engages the detent for operating the same by means of suitable mechanism Which Will be described hereinafter.

The forward end of the clutch shaft 4 is bored out centrally at 36 to receive the shaft 39 of the center-piece 37, having a center 3S. A slot 40 extends through the shaft 39 for the reception of a key 41, which extends outwardly through elongated slots 42 in the clutch shaft 4 and is secured in slots in a .movable clamping head 44, the outer ends of said key 41 having pins 43 passing there-Y through to hold the key in place. The movable clamping head 44 has canrnotches 411 and an annular groove 46 for the reception of a collar 47 having trunnions 4S which extend therefrom .on either side to engage. a fork 49 which is pivotedon a shaft a3() journaled in the bearing 51, which latter is mounted'on top of the base frame 1.

52'indieates a chuck head having a jaw 53 pivoted at 54 to the chuck vhead` in the slot 55. The pivoted jaw has an adjustable member 56 which is held in its adjusted po sition by means of the bolts 57 antl'S. The center piece 37 is also slotted at 59 to register `with the slots in the chuck head. On top of the outer end of the base frame 1 is mounted a bearing plate 60 having a. een tral hole 61 which is counterbored` to receive the' head of the bolt 62; lUpon the bearing plate 60 is mounted the bearing member 63. having journal bearings for the mandrels These mandrels 65 have journal shafts 66 with flanged ends 67, which abut against a locking nut 68 on the bolt 62. Handles 69 aresecured to the journal bearing member 63 by meansof Whichthe mandrel's may be rotated When desired. A recess 71 is formed inthe outer end of cach mandrel forvengalgingthe center 238, and in some casesy as illustrated in Figs. 5, 8 and 10, I may use a stop collar V oni each mandrel to limit the length of the coil in forming A bearing block 72 is secured to the upper end of the bolt 62 by means of thel nuts 74 and has a split bushing 73 for the reception of the square shaft 75 ufpon which is mounted at anV intermedi-ate point a clamp 7 61for adjustably securing the guide bar in position. thereon. Therear end of the square shaft is formed' round and is journaled in the bearing 3, the end projecting through the bearing and has keyed to its end a crank arm 78 the outer end of which is attached to one end of ant adjustable oonnecting link 79, theV oppositeend of the link being' connectedT to connecting plate 80 Which plate is connected'by the link 81 to a d ouble bell crank lever 83 and the crank arm 85. The connecting plate is also conneeted to the contact bar 34 by means of the links 82. The double bell` kcrank lever 83 is connected to the outer end of the piston' yrod 88 jby .links 86 'and the piston rod also .tions 90 and 91, controlled by an operating valve 92 having a fluid supply connection 93. 1 f

On the feed screw shaft 17, illustrated more clearly in Figs. 15, 16, andk 17, is mounted a split feed screw-nut 94 having' a rbase iange 95 rwithoutwardly Yextending pins 96 projecting into curved slots 98 of the cam disk 97. This lcam disk 97 has an extendingk shaft 99 formed integral therewith and journaled in a bearing 101 of a.

bridge bar 100. Around the'outer end of the bearing 101 isformed agroove 102 to receive the 'eye 122 of the piston rod 121.

The cam disk shaft 99 extends through the bearing 101 and has keyed thereon ay fork 128, an idler pinion 103 formed with a clutch member on its side for engaging the clutch portion on the side ofthe hand wheel 105 as at 104, anda hand lever 106 is keyed on the shaft and held in position by means of a nut 107. The bridge bar 100 is bolted tothe ycarriage 109by bolts 108. 110 indicates an opening into which the base of the split feed screw nut 94 and the cam disk 97 extend. This split kfeed screw nut 94 works in an opening or slide-way 111 in the carriage, said carriage being held in position by guide pieces 112. A guide post 118 `is attached to thel carriagev by set bolts 115 which extend through slots 114. On the upper endl of the guide post 118 is secured the guide 116 for holding and guiding'the rod 117 to be coiled.

After the carriage has completed its working stroke and the coil spring has been Vformed upon the mandrel, the carriage has to be returned to the position required for the commencement of the working operation. This is done by means of a fluid pressure pull-back cylinder 118 having a fluid supply pipe 119, which mayv furnish a constant pressure on the piston 120 at all times or the pressure may be exertedr upon the piston only at the end of the working stroke if desired. The piston 120 is connected to the carriage by means of the piston rod 121 having an eye k122 on the outer end-of the rod which fits in the grooved end of the bearing 101. A fork 123 is keyedto the disk shaft 99 andengages stops 125 on` the stop rod 124 for throwing the split feed nut 94 into and out of engagement with the feed screw shaft 17. In some ycases it may be desired to return'oradvance the rcarriage by means of the hand wheel 105, and this is done` by pressing the hand. wheel inward, thereby engaging ythe clutch -104 and the pinion 103, which meshes with the rack 126,

`this gearing being held against lateral movethrough the pipe connection 90 into the cylinder 89, the piston rod 88 vbeing advanced as clearly shown in Fig. 10; the right-hand side of the double bell crank lever is depressed as is also the contact bar 84, through the connections 81,` 80 and 82, allowing the dctentBO to be projectedv by the spring 31 into the recesses 32 in the loose cam wheel and at the saine time depressing the guide bar 77, which is secured in clamp 76 on the square yshaft 75 through the connecting link 79 and the crank arm 78. At the same time the left-hand side of the double-bell crank lever 83 through the connections 84, the crank arm 8.5 and the .fork 49 engaging the trunnions 48 on the collar 47, projects the movable clamping head forward together with the centerpiece and the center by means of the key 41 and this also clamps the forward end of the spring rod 117 to themandrel 65 by the movement of the movable clamping aw 58.

Power for rotating the chuck headV and advancing the carriage is furnished by the motor 14 which has a driving pinion 16 keyed to the motor shaft 15 which meshes with the gear 13 on the rear of the upper train gear shaft 7. The forward end of the shaft 7 has a gear 12 meshing with the gear 11 on the outer end of the intermediate train gear shaft 6. The shaft 6 has a gear 10 mounted thereon between the bearings 2 and 3 meshing with the loose gear 28 havin the cam wheel 29 formed integral therewith` The detent 30 when the contact bar 84 is t epressed as ,shown in Fig. 18, extends into a recess 32 and, as the gear 28 is rotated, it rotates the clutch shaft 4 together with the chuck head center piece 37 and mandrel 65. The gear 10 also meshes with the gear 9 on the lower train gear shaft 5, said shaft having a gear 8 on its rear end for rotating the feed screw shaft 17, through the idler gears 20 and 21, and the gear 18 on the feed screw shaft 17. As the carriage approaches the end of its forward travel, the free end of the spring rod 117 will pass through the guide 116 and will have a straight end portion which is held against the mandrel and formed thereon by the guide-bar 77 depressed as heretofore described, when the coiling operation is completed, the for-k 128 which is keyed to the cam disk shaft 99, comes in contact withv one of the adjustable stops 125 on the rod 124 thereby rotating the cam disk 97 and throwing the split nut 9dout of engagement with the thread of the feed screw shaft 17. The fluid pressure cylinder 118 with its connections, then returns the carriage to position for again beginning the operation. The fork 123 then comes in contact with another stop 125, which rotates the cam disk 97 in the opposite direction, thereby throwing the split nut 9d into engagement with the thread of the `feed screw shaft 17. As the carriage 109 is returned by the fluid pressure cylinder 118, the valve 92 is operated to exhaust the fluid pressure in the cylinder 89 through the pipe 90 and admits fluid pressure to the cylinder through pipe 91, thereby reciprocating the piston in the cylinder, thus throwing the clamping head dt ont of engagement with the jaw 53 and raising the contact bar 34: with the detent 30, and the gear 28 and cam wheel 29 are free to rotate on the clutch shaft 1. The journal bearing member (33 with the mandrels 65, is now rotated about one-third of a revolution so that the coilspring just formed may be taken off vthe mandrel, whereupon another mandrel is brought into position for forming another coil-spring while the third one is being cooled, by spraying with water or any other approved means.

j In some cases I may prefer not to use the pullback cylinder 118 for returning the carriage or the adjustable stops 125 for throwing the split-nut 911 into or ont of engagementwith the feed screw shaft 17, or if they are used, I may desire to control the feed and carriage independently. IVith this end in View I have shown keyed to the outer end of the cam disk shaft 99, a hand lever 106 by means of which the split nut 94 is thrown into or out of engagement with the feed screw shaft 17.

IVhen the split-mit 94 is thrown ont of engagement with the feed screw sha-ft 17, the hand wheel 105 is thrown into engagement with the clutch 104n and pinion 103, which meshes with the rack 126, thus enabling` the operator by rotating the hand-wheel 105 to move the carriage 109 to any desired position.

Although I have shown and described my improvements in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use such substitutions, modifications or equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claims.

Having thus described myr invention, what I claim and desire to secure by Letters Patent is 1. In a springcoiling machine, a rod feeding mechanism, a rotary mandrel, a clutch-shaft adapted to engage and rotate saidA mandrel, means adapted to rotate said clutch-shaft, and means adapted to revolve :aid mandrel intoI and out of line with said A clutch-shaft. Y

feedinfv mechanism a mandrel havinnr one end thereof mounted in a journal bearing, a clutchshaft adapted to engage and rotate said mandrel, means adapted to rotate said clutchshaft, and means for revolving the journal bearing into and out of line with said'clutch shaft.

4. In a springscoiling machine, a rod feeding'mechanism, a plurality'of mandrels carried in radially disposed journal bearings mounted on a supporting member, a clutch.-shaft adapted to engage and rotate any one of said mandrels, means adapted to rotate said clutch-shaft, and means adapted to rotate said supporting member whereby any one of the said mandrels can `be revo ved into or out of alinement with said clutch-shaft; i 5.` In aspring-coiling machine, a rod feeding mechanism, a plurality of mandrels, one end of eachof which is rotatably mounted in a journal bearing member, a rotating means adapted to rotate any one of said mandrels, and means adapted to revolve said journal bearing member whereby any one of said mandrfls can be placed into or out of alinement with said rotating means.

G. In a spring-ceiling machine, a rod feeding mechanism, a plurality of mandrels each rotatably mounted in a journal bearing member, means for rotating the mandrels, and means for revolving the journal bearing member onV an axis substantially jierpendicular to the axes ofthe mandrels.

7. In a spring-coiling machine, a base frame, a clutch-shaft mounted thereon, a chuck carried by the forward end of said dutchshaft, a plurality of rotatable and revoluble mandi-els, means for feeding a spring-forming rodV to one of said mandrels, and means operated by fluid-pressure, for holding the end of the spring rod on the mandrel.

8. In a spring-coiling machine. a base frame, a clutch-shaft mounted in bearings thereon, a chuck carried by the forward end of said clutch-shaft, a plurality of rotatable mandrels, means for feeding a spring rod to one of said mandrels, fluid pressure operated means adapted to hold the end of thespring forming rod on the mandrel and means for rotating the clutchshaft.

9. In ak springframe, a shaft mounted in bearings thereon, a chuck carried by the forward end of said shaft, fluid-pressure operated meansadapted to control'the rotationof said shaft, a rotatable mandrel, means.` for` feeding a spring forming rod to the mandrel, fluid pressure operated means adapted to hold the end of the spring rod ony the mandrel, and means for simultaneously rotating the shaft and mandrel. 10. In a spring-ceiling machine, a bas frame, a shaft mounted in. bearings thereon, a-gear mounted on said shaft, a clutch provided with fluid-pressure operated means adapted to control the engagement of said clutch with said gear, a chuck carried by the forward end ofthe shaft, a center attached to the end of the shaft', a rotatable mandrel,

means for feeding a spring forming rod to the mandrel, fluid-pressure operated means adapted to hold the end ofthe spring rod on the mandrel and means for simultane ously rotating theshaft and mandrel. n

11. In a spring-ceiling machine, a plurality of rotatable mandrels, a guide mounted on a reciprocating carriage adapted to feed a rodto one of said mandrels, a clutchshaft, a fluid-pressure operated chuck mounted on the forward end of said clutchshaft .and adapted to clamp the rod to the aforesaid one of said mandrels, means for simultaneously rotating the shaft and the Vmandrel to which the rod is clamped, and

means for revolving the mandrels into and i out of line with the clutch-shaft.

12. In a spring-coiling machine,-a rotatable mandrel, a guide mountedupon a reciprocating carriage adapted to feed a rod to the mandrel, a clutch shaft, a chuck carried by the forward end of said clutch shaft adapted to grip the rod, means for rotating the clutch shaft and mandrel simultaneously and means for revolving the mandrel.

13. In a spring-ceiling machine, a rotatable mandrel, rod feeding mechanism adapted to feed a rod to the mandrel, means for advancing and reciprocating the feeding mechanism, a clutch shaft, a chuck carried by the forward end of said clutch shaft, fluid pressure means adapted to operate said clutch to grip the rod, means controlled by fluid pressure adapted to rotate the clutch shaft and mandrel simultaneously, and means for revolving the mandrel.

141. In a spring-coiling machine, a plurality of rotatable mandrels, rod feeding .mechanism, means for advancing and returning the feeding mechanism, a plurality of rotatable mandrels mounted in journal bearings, a clutch shaft, a chuck carried by the forward endof said clutch shaft, fluid pressure controlling means for said clutchk ceiling machine, a basek shaft, means for rotating the clutch Shaft and one of the mandrcls simultaneouslyand means for revolving the mandrels.

` 15. Ina spring-ceiling machine, rod feeding mechanism adapted to feed a rod to a forming mandrel, means for advancing and retracting the said feeding mechanism, a clutch-shaft, means for rotating the clutchshaft, a chuck carried by the forward end of said clutch-shaft adapted to grip the end of the rod on the mandrel, and fluid pressure means for controlling the chuck and rotation of the clutch shaft.

16. Ina spring-ceiling machine, a plurality of rotatable mandrels, a guide mountcd on a carriage adapted to feed a rod to one of said mandrels, a screw-feeding mechanism adapted to gradually advance the carriage, fluid-pressure means to return the carriage, a fluid pressure operated chuck adapted to hold the end of the rod on the aforesaid one of said mandrels and means for simultaneously rotating the chuck and said mandrel.y

17. In a spring-ceiling machine, a rotatable mandrel, a guide mounted Aon a carriage adapted to feed a rod to the mandrel, screw feeding mechanism-adapted to gradually advance the carriage, means for throwing the carriage into and out of engagementv with the screw feed, fluid-pressure means adapted to return the carriage, a chuck to grip the end of the rod on the mandrel, and means controlled by fluid-pressure for simutaneously rotating the chuck and mandrel. Y

18.y In a yspring-coiling machine, a rotatable mandrel, aguide mounted on a carriage adapted to feed la rod to the mandrel, a feed screw shaft,.a split-nut mounted on the carriage adapted to gradually advance the same, a cam disk engaging the split-nut and adapted to'throw the carriage into and out of engagement with the feed screw shaft, Huid pressure means to return the carriage, a chuck adapted to grip the end of the rod on the mandrel, and means controlled. by fluid pressure Vfor simultaneously rotating the chuck and mandrel.

19. In a spring coiling machine, a rotatable mandrel, a guide mounted on a carriage adapted to feed a rod tothe mandrel, a continuously driven feed screw shaft passn ing through the carriage, a split-nut mounted in the carriage adapted to engage the feed screw shaft, thereby gradually advancrality of mandrels, the end of each mandrel being rotatably mounted in a journal'bearing member, a guide carried by a carriage adapted to feed a rod to one of the mandrels, a continuously driven feed screw 1 0 shaft passing through the carriage, a splitnut mounted in the carriage adapted to engage the feed screw shaft thereby gradually advancing the carriage, a cam-disk engaging projecting pins on the splitnut, means for rotating the cam disk in one direction,

thereby throwing the carriage out of engagement with tlie feed screw shaft, means for retracting the carriage and throwing the carriage into engagement with the feed screw-shaft, a chuck adapted to grip the end of the rod on one of the mandrels, means for revolving the rotatable mandrels and means controlled by fluid pressure for simultaneously rotating the chuck and one'of the mandrels.

2l. In a. spring-ceiling machine, a base frame, a clutch-shaft journaled in bearings mounted thereon, a loose gear rotatably mounted on the clutch shaft, a fluid pres- 304sure operated detent seated within the clutch shaft and adaptedto be thrown into or out of engagement with the loose gear, a chuck carried by the forward end of the clutch shaft, a jaw pivoted to the chuck head, a movable clamping head slidable upon the clutch-shaft havin cam surfaces adapted to engage the pivote jaw, and fluid pressure means adapted to reciprocate the clamping head.

22. In a spring-coiling machine, a baseframe, a clutch shaft journaled in bearings mounted thereon, a loose gear mounted and provided with means to rotate the same continuously on the clutch shaft, a spring proj ected detent seated within the clutch shaft and adapted to be thrown into or out of engagement with the looose gear by fluid pressure means, a rotatable mandrel, feeding mechanism adapted to feed a rod to the mandrel, a chuck carried by the forward end of the clutch shaft, an adjustable jaw pivoted to the chuck head, a clamping head slidably mounted upon the clutch-shaft havinr cam surfaces adapted to engage the pivoter jaw, thereby gripping the end of the rod upon the mandrel, and fluidpressure means to reciprocate the clamping head.

In witness whereof I hereunto affix my" signature.

EMIL c. BANNER. 

